package com.itheima.stringtest;

import java.util.Scanner;

public class Test3 {
    public static void main(String[] args) {
        //键盘录入一个字符串，统计该字符串中大写字母字符，
        // 小写字母字符，数字字符出现的次数(不考虑其他字符)
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串");
        String str = sc.next();

        int bigCount = 0;
        int smallCount = 0;
        int numberCount = 0;

        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (c >= 'A' && c <= 'Z') {
                bigCount++;
            } else if (c >= 'a' && c <= 'z'){
                smallCount++;
            }else if(c>='0' && c <= '9'){
                numberCount++;
            }
        }
        System.out.println("大写字母字符的个数为"+bigCount);
        System.out.println("小写字母字符的个数为"+smallCount);
        System.out.println("数字字符的个数为"+numberCount);


    }
}
